Mariano Rivera made it clear throughout his final season that he had no second thoughts about retirement.

Still, he saved his most blunt assessment of his situation for David Ortiz when the two went to lunch in Boston prior to a game at Fenway Park in mid-September, with the Yankees trying to remain in postseason contention.

“I can’t wait for the moment when this is over,” Rivera said in Spanish to the Red Sox slugger. “I’m ready for it already, brother. I’m ready for it. Mentally and physically, I’m ready for it. There’s no desire anymore.”

The conversation is part of a documentary, “BEING: Mariano Rivera,” which premieres Sunday on Fox for baseball fans unaccustomed to not seeing Rivera in October.

Given unique access to the closer both at home and with the Yankees, the film follows Rivera throughout 2013, interspersed with highlights from his entire professional career, including footage showing Rivera in spring training in 1995 wearing No. 31.

Interviews with Rivera, his family in Panama and others provide a glimpse into the now-retired pitcher’s life.

Some of the more memorable scenes include a reunion with the Yankees scout who signed Rivera in 1990, Herb Raybourn, who saw Rivera as a shortstop before signing Rivera a year later as a pitcher.

Rivera is also shown sitting on a golf cart in a hallway at Yankee Stadium, waiting to be introduced for his pre-game ceremony in the Bronx.

While there, he is seen reviewing a speech he had written for the occasion, but forgot to look at when he spoke to the crowd.

He also noted that while Metallica showed up to sing “Enter Sandman,” Rivera “would have never picked a song like that. I hate [heavy metal], but at same time we will be connected to the end.’’

At the end of the season, the wear and tear of the year was also evident. Rivera pointed out that “everybody wants a piece of you” as he’s shown signing autographs and doing interviews during the latter part of the season.

“We keep doing this for what?” Rivera continued during his chat in the Boston restaurant with Ortiz. “Is it for boastfulness, or for the love of the game, or because we don’t want to do anything else?”